Evaluation of a composite soil cover to control acid waste rock pile drainage

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Sommaire: The On-Stream Analyzer has proven, and is still proving to be, an extremely valuable tool for the control of flotation circuits. This paper examines the possibility of going further in the utilization of the analyzer results by using a real-time material balance program to calculate the mass flow rates within the streams of a circuit for process control, analysis and optimization as well as for the detection of sensor malfunction. The material balance algorithm improves measurements and give...
Publication: CIM Bulletin
Auteur(s): C. Bazin, A.R. Trusiak, D. Hodouin
Numéro: 995
Volume: 88
Année: 1995
Texte
Sommaire: Line Creek Resources Ltd. produces three million clean tonnes per year of metallurgical and thermal coals for the international market. The mining operation, which is located in the mountains of southeastern British Columbia, produces coal from four pits by conventional truck and shovel methods.
The South Pit, which has been in operation since 1982, has a benched highwall 490 m in height. Shallow dipping coal seams at the base of the syncline formation will be exposed in the highwall over the...
Publication: CIM Bulletin
Auteur(s): R. Williams
Numéro: 995
Volume: 88
Année: 1995
Texte
Sommaire: The potential use of industrial and municipal waste glass as a partial pozzolanic replacement for Normal Portland cement in mine backfill has been investigated. Considerable quantities of glass are currently discarded into landfill sites at high cost to municipal and industrial users with no foreseeable environmental benefits being gained by such disposal. This research study was undertaken to assess the viability of using ground waste glass materials as partial binder replacement of Portland...
Publication: CIM Bulletin
Auteur(s): J.F. Archibald, D.O. DeGagne, P. Lausch, E.M. De Souza
Numéro: 995
Volume: 88
Année: 1995
Texte
Sommaire: Garnet occurs in schists and gneisses in all provinces of Canada, but mainly in Quebec and Ontario. There is currently a renewed interest in exploration for economic sources of garnet for abrasive applications because of the inherent dangers from exposure to ground silica from sandblasting operations.
High-quality garnet is used for lapping and grinding of glass and ceramics; for coated and bonded products such as sandpaper and cloth; and abrasive wheels for grinding and finishing various...
Publication: CIM Bulletin
Auteur(s): P.R.A. Andrews
Numéro: 995
Volume: 88
Année: 1995
Texte
Sommaire: The optimal geochemical parameters required to form ettrin-gite in a lime-remediated site have been investigated with the use of thermodynamic modelling. The speciation of sulphate and 10 metals analyzed in samples of a mine tailing from northern Quebec was calculated with a computer model. The model also includes calcium, which would result from the addition of lime to the system. Two speciation calculations were done. The first one is a hypothetical speciation before the onset of precipitat...
Publication: CIM Bulletin
Auteur(s): A.M.O. Mohamed, J.F. Boily, M. Hossein, F.P. Hassani
Numéro: 995
Volume: 88
Année: 1995
Texte
Sommaire: Autogenous grinding is used quite frequently for mineral comminution as a result of its lower capital and operating costs. However, it is more difficult to control than conventional grinding, particularly when the autogenous or semiautogenous mill is the only comminution stage (i.e. no secondary grinding is available). Analysis of the control strategy used then becomes extremely important, a task that is greatly simplified by the use of an empirical dynamic simulator.
This paper presents the...
Publication: CIM Bulletin
Auteur(s): J. Valenzuela, R. del Villar, M. Bourassa, S. StArnaud
Numéro: 995
Volume: 88
Année: 1995
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